My friend send me the following dimension for her bag shaper as follow.
Thought of sharing it with the rest of the members.
Good luck in your DIY
LV neverfull PM 10.5 x 4.75
LV Le Pliage Medium Long Handle 11.5 x 7.5
LV Speedy 30 Monogram, Damier and Epi 11.75 x7
LV neverfull MM 12 x 6
LV Speedy 35 13.5 x 7